Datasheet

Section 16 I
2
C Bus Interface (IIC) (Optional)
Rev. 3.00 Mar 21, 2006 page 433 of 788
REJ09B0300-0300
Bit Bit Name Initial Value R/W Description
3AL 0 R/(W)
*
Arbitration Lost Flag
Indicates that arbitration was lost in master mode.
[Setting conditions]
When ALSL = 0
• If the internal SDA and SDA pin disagree at the rise of
SCL in master transmit mode
• If the internal SCL line is high at the fall of SCL in
master transmit mode
When ALSL = 1
• If the internal SDA and SDA pin disagree at the rise of
SCL in master transmit mode
• If the SDA pin is driven low by another device before
the I
2
C bus interface drives the SDA pin low, after the
start condition instruction was executed in master
transmit mode
[Clearing conditions]
• When ICDR is written to (transmit mode) or read from
(receive mode)
• When 0 is written in AL after reading AL = 1
2 AAS 0 R/(W)
*
Slave Address Recognition Flag
In I
2
C bus format slave receive mode, this flag is set to 1 if
the first frame following a start condition matches bits SVA6
to SVA0 in SAR, or if the general call address (H'00) is
detected.
[Setting condition]
When the slave address or general call address (one frame
including a R/W bit is H'00) is detected in slave receive
mode and FS = 0 in SAR
[Clearing conditions]
• When ICDR is written to (transmit mode) or read from
(receive mode)
• When 0 is written in AAS after reading AAS = 1
• In master mode